4dots Free PDF Metadata Editor allows to batch edit pdf properties such as author, title, subject and keywords. The application is very easy to use. It is integrated into Windows Explorer and can be used with a right click or with drag and drop.
Metadata can get you into trouble! Whenever an MS Office document is created it is complemented with such properties as the author, corporate name, document changes, editing time and other metadata.
Element-IT FileMetadata .NET control provides methods to add and modify metadata for any files and folders at NTFS file system. Control uses Alternate Data Streams technology to work with metadata.